Modulation of granulocyte apoptosis can influence the resolution of inflammation

Biochem Soc Trans. 2007 Apr;35(Pt 2):288-91. doi: 10.1042/BST0350288.

Abstract

Apoptosis of granulocytes and the subsequent clearance of apoptotic cells are important processes for the successful resolution of inflammation. Signalling pathways, including those involving NF-kappaB (nuclear factor kappaB), MAPK (mitogen-activated protein kinase) and PI3K (phosphoinositide 3-kinase) have been shown to be key regulators of inflammatory cell survival and apoptosis in vitro. In addition, manipulation of such pathways in vivo has indicated that they also play a role in the resolution of inflammation. Furthermore, manipulation of proteins directly involved in the control of apoptosis, such as Bcl-2 family members and caspases, can be targeted in vivo to influence inflammatory resolution. Recently, it has been shown that CDK (cyclin-dependent kinase) inhibitor drugs induce caspase-dependent human neutrophil apoptosis possibly by altering levels of the anti-apoptotic Bcl-2 family member, Mcl-1. Importantly, CDK inhibitor drugs augment the resolution of established 'neutrophil-dominant' inflammation by promoting apoptosis of neutrophils. Thus manipulation of apoptotic pathways, together with ensuring macrophage clearance of apoptotic cells, appears to be a viable pharmacological target for reducing established inflammation.

MeSH terms

  • Apoptosis*
  • Granulocytes / cytology*
  • Granulocytes / physiology*
  • Homeostasis
  • Humans
  • Inflammation / physiopathology*
  • Inflammation / prevention & control*
  • Mitogen-Activated Protein Kinases / metabolism
  • NF-kappa B / physiology
  • Signal Transduction

Substances

  • NF-kappa B
  • Mitogen-Activated Protein Kinases